On 2020-08-20, Todd C Miller <mill...@openbsd.org> wrote: > On Wed, 19 Aug 2020 23:47:57 +0200, Vincent wrote: > >> After several days, I have to reboot my machine because of mfs full. This is >> not the first time. >> I have few mfs on this machine, but I observe that this is always a full >> filesystem on /tmp after +40 days of uptime. >> But on other mfs, I have very low filesystem activity. > > It is possible for a process to have a file open that doesn't have > a directory entry. This can happen when a process opens a file, > unlinks it, and continues to write to it.
Or a process opens a file at boot, writes to it and continues writing, but nothing reads it to update atime for 7 days (or it is read but the user has mounted with noatime), then /etc/daily removes it in tmp cleanup, but the original process still has the handle open.
